7f4227d59a
[libFuzzer] use data-flow feedback from strcmp
...
llvm-svn: 244084
2015-08-05 18:23:01 +00:00
86a5fba71d
[libFuzzer] more refactoring of the Mutator and adding tests to it
...
llvm-svn: 243818
2015-08-01 02:23:06 +00:00
8ce7424e9c
[libFuzzer] start refactoring the Mutator and adding tests to it
...
llvm-svn: 243817
2015-08-01 01:42:51 +00:00
1165efdbf9
[libFuzzer] limit the size of the inputs printed to stderr
...
llvm-svn: 243795
2015-07-31 22:07:17 +00:00
fe7e41e8f5
[libFuzzer] make sure that 2-byte arguments of switch() are handled properly
...
llvm-svn: 243781
2015-07-31 20:58:55 +00:00
73932e5fe3
[libFuzzer] record traces from the switch statements only when told to do so
...
llvm-svn: 243768
2015-07-31 18:09:08 +00:00
cd6a4665e0
[libFuzzer] support switch interception in dfsan mode
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llvm-svn: 243760
2015-07-31 17:05:05 +00:00
fb7d8d9d06
[libFuzzer] trace switch statements and apply mutations based on the expected case values
...
llvm-svn: 243726
2015-07-31 01:33:06 +00:00
c9dc96bfc6
[libFuzzer] fix the strncmp interceptor -- it should respect short strings.
...
llvm-svn: 243691
2015-07-30 21:22:22 +00:00
b74ba421fc
[libFuzzer] implement strncmp hook for data-flow-guided fuzzing (w/ and w/o dfsan), add a test
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llvm-svn: 243611
2015-07-30 02:33:45 +00:00
0e776a2250
[libFuzzer] implement memcmp hook for data-flow-guided fuzzing (w/o dfsan), extend the memcmp fuzzer test
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llvm-svn: 243603
2015-07-30 01:34:58 +00:00
ae7df1ca4d
[libFuzzer] ensure that the dfsan tracing hooks actually run (using -verbosity=3 in tests)
...
llvm-svn: 243365
2015-07-28 01:25:00 +00:00
35959592a3
[libFuzzer] when using cmp traces, first check that the CMP is evaluated to one value much more frequently than to the other value (heuristic)
...
llvm-svn: 243363
2015-07-28 00:59:53 +00:00
404c69f2c8
[libFuzzer] allow users to supply their own implementation of rand
...
llvm-svn: 243078
2015-07-24 01:06:40 +00:00
2b7d2e91cc
[libFuzzer] dump long running units to disk
...
llvm-svn: 243031
2015-07-23 18:37:22 +00:00
4800c2de28
[Fuzzer] Rely on $PATH expansion instead of hardcoding paths in tests. NFC.
...
llvm-svn: 242851
2015-07-21 22:51:55 +00:00
dc324e1644
[Fuzzer] Clearly separate regular and DFSan tests. NFC.
...
llvm-svn: 242850
2015-07-21 22:51:49 +00:00
86e4a3e0a3
[libFuzzer] require the files and directories passed to the fuzzer to exist
...
llvm-svn: 242596
2015-07-18 00:03:37 +00:00
2ea204e645
[lib/Fuzzer] make assertions more informative and update comments for the user-supplied mutator
...
llvm-svn: 238658
2015-05-30 17:33:13 +00:00
3fe7682fb0
[lib/Fuzzer] relax an assertion
...
llvm-svn: 238608
2015-05-29 20:31:17 +00:00
316b571007
[lib/Fuzzer] make the fuzzing timeout 1200 seconds by default (was: infinity)
...
llvm-svn: 238251
2015-05-26 20:57:47 +00:00
c5f905cceb
[lib/Fuzzer] fix docs
...
llvm-svn: 238236
2015-05-26 19:32:52 +00:00
c8228dd9fb
[lib/Fuzzer] fix build with assertions
...
llvm-svn: 238235
2015-05-26 19:29:33 +00:00
e0d60ba876
[lib/Fuzzer] doxygen-ify the comments for the user interface
...
llvm-svn: 238086
2015-05-23 02:12:05 +00:00
7c180eafc1
[lib/Fuzzer] fully get rid of std::cerr in libFuzzer
...
llvm-svn: 238081
2015-05-23 01:22:35 +00:00
20e9bcbfc8
[lib/Fuzzer] start getting rid of std::cerr. Sadly, these parts of C++ library used in libFuzzer badly interract with the same code used in the target function and also with dfsan. It's easier to just not use std::cerr than to defeat these issues.
...
llvm-svn: 238078
2015-05-23 01:07:46 +00:00
f3c7cb464e
[lib/Fuzzer] remove -use_coverage_pairs=1, an experimental feature that is unlikely to ever scale
...
llvm-svn: 238063
2015-05-22 22:47:03 +00:00
f342459aa4
[lib/Fuzzer] extend the fuzzer interface to allow user-supplied mutators
...
llvm-svn: 238059
2015-05-22 22:35:31 +00:00
71e0feb1ac
[lib/Fuzzer] ignore flags that start with --; use git pull --rebase instead of just git pull
...
llvm-svn: 237950
2015-05-21 20:39:13 +00:00
490bbd6fa4
[lib/Fuzzer] change the meaning of -timeout flag: now timeout is applied to every unit of work separately
...
llvm-svn: 237735
2015-05-19 22:12:57 +00:00
cbb2334b7a
[lib/Fuzzer] more efficient reload logic; also don't spam git too much
...
llvm-svn: 237649
2015-05-19 01:06:07 +00:00
2da7b84852
[lib/Fuzzer] when -sync_command=<CMD> is given, periodically execute 'CMD CORPUS' to synchronize with other processes
...
llvm-svn: 237617
2015-05-18 21:34:20 +00:00
a8f01bc8e1
Code cleanup: Reindent Fuzzer::MutateAndTestOne.
...
llvm-svn: 237533
2015-05-17 02:44:31 +00:00
96eab65d81
[lib/Fuzzer] Add SHA1 implementation from public domain.
...
Summary:
This adds a SHA1 implementation taken from public domain code.
The change is trivial, but as it involves third-party code I'd like
a second pair of eyes before commit.
LibFuzzer can not use SHA1 from openssl because openssl may not be available
and because we may be fuzzing openssl itself.
Using sha1sum via a pipe is too slow.
Test Plan: n/a
Reviewers: chandlerc
Reviewed By: chandlerc
Subscribers: majnemer, llvm-commits
Differential Revision: http://reviews.llvm.org/D9733
llvm-svn: 237400
2015-05-14 22:41:49 +00:00
1ce4ebf7d6
[lib/Fuzzer] enable -use_counters=1 by default
...
llvm-svn: 237272
2015-05-13 18:31:46 +00:00
80ec5a11b5
[lib/Fuzzer] A simple script to synchronise a fuzz test corpus with an external git repository.
...
llvm-svn: 237208
2015-05-12 23:19:12 +00:00
f47198aa36
[lib/Fuzzer] use sha1sum for the file hash
...
llvm-svn: 237198
2015-05-12 22:03:34 +00:00
9690fcf12e
[lib/Fuzzer] guess the right number of workers if -jobs=N is given but -workers=M is not. Update the docs.
...
llvm-svn: 237163
2015-05-12 18:51:57 +00:00
d8c54724a8
[lib/Fuzzer] remove the -dfsan=1 flag, just use -use_traces=1 (w/ or w/o dfsan)
...
llvm-svn: 237083
2015-05-12 01:58:34 +00:00
cd7629caec
[lib/Fuzzer] detach the pulse thread instad of joining it
...
llvm-svn: 237082
2015-05-12 01:43:20 +00:00
8817e86efd
[lib/Fuzzer] don't record traces when trace collection is off
...
llvm-svn: 237067
2015-05-11 23:25:28 +00:00
83fd486ff4
[lib/Fuzzer] when running multiple fuzzing processes, print something every 10 minutes to avoid buildbot timeouts
...
llvm-svn: 237054
2015-05-11 21:31:51 +00:00
225262562f
[lib/Fuzzer] rename FuzzerDFSan.cpp to FuzzerTraceState.cpp; update comments. NFC expected
...
llvm-svn: 237050
2015-05-11 21:16:27 +00:00
5a99ecbbb3
[lib/Fuzzer] add a trace-based mutatation logic. Same idea as with DFSan-based mutator, but instead of relying on taint tracking, try to find the data directly in the input. More (logic and comments) to go.
...
llvm-svn: 237043
2015-05-11 20:51:19 +00:00
f3f3ed323a
[lib/Fuzzer] build tests that work well with dfsan also w/o dfsan
...
llvm-svn: 236909
2015-05-08 21:45:19 +00:00
1ac8055bc7
[lib/Fuzzer] use -fsanitize-coverage=trace-cmp when building LLVM with LLVM_USE_SANITIZE_COVERAGE; in lib/Fuzzer try to reload the corpus to pick up new units from other processes
...
llvm-svn: 236906
2015-05-08 21:30:55 +00:00
21a3381a38
Update CMake flags, LibFuzzer comments and docs for new -fsanitize-coverage= flags.
...
llvm-svn: 236797
2015-05-07 23:33:24 +00:00
beb24c38e7
[lib/Fuzzer] change the way we use taint information for fuzzing. Now, we run a single unit and collect suggested mutations based on tracing+taint data, then apply the suggested mutations one by one. The previous scheme was slower and more complex.
...
llvm-svn: 236772
2015-05-07 21:02:11 +00:00
7d470cfb0c
[lib/Fuzzer] minor refactoring/simplification, NFC
...
llvm-svn: 236757
2015-05-07 18:32:29 +00:00
a407ddef27
[lib/Fuzzer] add dfsan_weak_hook_memcmp, enable the test that uses it, simplify the test runner
...
llvm-svn: 236683
2015-05-07 00:11:33 +00:00
3befe94acb
[lib/Fuzzer] remove dfsan_fuzzer_abi.list -- its contents are now moved to dfsan proper
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llvm-svn: 236659
2015-05-06 22:47:24 +00:00
754f55d6f5
[lib/Fuzzer] add a fuzzer test for memcmp (does not work yet)
...
llvm-svn: 236656
2015-05-06 22:36:00 +00:00
566bc5aa8a
[lib/Fuzzer] rename TestOneInput to LLVMFuzzerTestOneInput to make it more unique
...
llvm-svn: 236652
2015-05-06 22:19:00 +00:00
ca6a2a2f1c
[lib/Fuzzer] on crash print the contents of the crashy input as base64
...
llvm-svn: 236548
2015-05-05 21:59:51 +00:00
177582c90f
[lib/Fuzzer] use handle_abort=1 by default so that when assert() fires we save the test case
...
llvm-svn: 236476
2015-05-05 01:42:55 +00:00
f77031f99d
Removing a spurious space; NFC.
...
llvm-svn: 234168
2015-04-06 16:09:13 +00:00
043ab1c8a7
[fuzzer] document the -tokens flag. Also change the diagnostic output
...
llvm-svn: 233842
2015-04-01 21:33:20 +00:00
52a788e503
[fuzzer] Add support for token-based fuzzing (e.g. for C++). Allow string flags.
...
llvm-svn: 233745
2015-03-31 20:13:20 +00:00
35ce8630f3
Move lib/Fuzzer docs from a README.txt to a proper .rst file.
...
Summary:
Move lib/Fuzzer docs from a README.txt to a proper .rst file.
This change does not add any content, just formatting.
Test Plan: n/a
Reviewers: samsonov
Reviewed By: samsonov
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D8710
llvm-svn: 233638
2015-03-30 23:05:30 +00:00
16901a901d
[fuzzer] when a single unit takes over 1 second to run and it is the slowest one so far, print it.
...
llvm-svn: 233637
2015-03-30 23:04:35 +00:00
03db8b9225
[fuzzer] print various stats in a unified way
...
llvm-svn: 233624
2015-03-30 22:44:03 +00:00
16d03bd051
DFSan-based fuzzer (proof of concept).
...
Summary:
This adds a simple DFSan-based (i.e. taint-guided) fuzzer mutator,
see the comments for details.
Test Plan: a test added
Reviewers: samsonov, pcc
Reviewed By: samsonov, pcc
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D8669
llvm-svn: 233613
2015-03-30 22:09:51 +00:00
be5e0ed919
[sanitizer/coverage] Add AFL-style coverage counters (search heuristic for fuzzing).
...
Introduce -mllvm -sanitizer-coverage-8bit-counters=1
which adds imprecise thread-unfriendly 8-bit coverage counters.
The run-time library maps these 8-bit counters to 8-bit bitsets in the same way
AFL (http://lcamtuf.coredump.cx/afl/technical_details.txt ) does:
counter values are divided into 8 ranges and based on the counter
value one of the bits in the bitset is set.
The AFL ranges are used here: 1, 2, 3, 4-7, 8-15, 16-31, 32-127, 128+.
These counters provide a search heuristic for single-threaded
coverage-guided fuzzers, we do not expect them to be useful for other purposes.
Depending on the value of -fsanitize-coverage=[123] flag,
these counters will be added to the function entry blocks (=1),
every basic block (=2), or every edge (=3).
Use these counters as an optional search heuristic in the Fuzzer library.
Add a test where this heuristic is critical.
llvm-svn: 231166
2015-03-03 23:27:02 +00:00
2e3622bddd
[fuzzer] one more experimental search mode: -use_coverage_pairs=1
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llvm-svn: 229957
2015-02-20 03:02:37 +00:00
016852c396
[fuzzer] split main() into FuzzerDriver() that takes a callback as a parameter and a tiny main() in a separate file
...
llvm-svn: 229882
2015-02-19 18:45:37 +00:00
2117269dd1
[fuzzer] properly annotate fallthrough, add one more entry to FAQ
...
llvm-svn: 229880
2015-02-19 18:21:12 +00:00
db4d645714
[fuzzer] move default sanitizer options to a separate file
...
llvm-svn: 228429
2015-02-06 19:52:07 +00:00
92e0476c67
[fuzzer] add flag prefer_small_during_initial_shuffle, be a bit more verbose
...
llvm-svn: 228235
2015-02-04 23:42:42 +00:00
33f866922a
[fuzzer] add -runs=N to limit the number of runs per session. Also, make sure we do some mutations w/o cross over.
...
llvm-svn: 228214
2015-02-04 22:20:09 +00:00
5b266a8a23
[fuzzer] make multi-process execution more verbose; fix mutation to actually respect mutation depth and to never produce empty units
...
llvm-svn: 228170
2015-02-04 19:10:20 +00:00
fe43aa8d19
[fuzzer]: fix exit code, add more diagnostics
...
llvm-svn: 228103
2015-02-04 01:22:57 +00:00
cf9fdd5876
[fuzzer] Add proper dependensices to the fuzzer tests
...
Summary: Make sure that FileCheck is built when running check-fuzzer
Test Plan:
run on bot:
lab.llvm.org:8011/builders/sanitizer-x86_64-linux-fuzzer
Reviewers: samsonov
Reviewed By: samsonov
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D7387
llvm-svn: 228045
2015-02-03 21:57:32 +00:00
4b96ce96c6
[fuzzer] update the include line to use the new header name
...
llvm-svn: 228018
2015-02-03 19:42:05 +00:00
e8cee11570
[fuzzer] add flags to run fuzzer in multiple parallel processes
...
llvm-svn: 227664
2015-01-31 01:14:40 +00:00
71672552db
[fuzzer] Add a gtest-style test
...
Summary: Add one gtest-style test.
Test Plan: run on bot
Reviewers: samsonov
Reviewed By: samsonov
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D7287
llvm-svn: 227639
2015-01-30 23:26:57 +00:00
2c1b33b897
[fuzzer] add -use_full_coverage_set=1 which solves FullCoverageSetTest. This does not scale very well yet, but might be a good start.
...
llvm-svn: 227507
2015-01-29 23:01:07 +00:00
0ff86c79b4
[fuzzer] fix warning in a test
...
llvm-svn: 227478
2015-01-29 18:13:36 +00:00
6d768fcc18
[fuzzer] minor cleanup based on reviews: remove redundant includes, fix a copy-pasto in tests
...
llvm-svn: 227468
2015-01-29 17:16:23 +00:00
a1849af4a9
[fuzzer] add FAQ section to the README.txt
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llvm-svn: 227466
2015-01-29 17:11:30 +00:00
ef11698cac
Reverting r227452, which adds back the fuzzer library. Now excluding the fuzzer library based on LLVM_USE_SANITIZE_COVERAGE being set or unset.
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llvm-svn: 227464
2015-01-29 16:58:29 +00:00
7b54ed221a
Temporarily reverting the fuzzer library as it causes too many build issues for MSVC users. This reverts: 227445, 227395, 227389, 227357, 227254, 227252
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llvm-svn: 227452
2015-01-29 15:49:22 +00:00
d39df1e24d
Adding missing #includes to try to get this to compile on Windows with Visual Studio.
...
llvm-svn: 227445
2015-01-29 15:19:13 +00:00
265cf04f9c
[fuzzer] add option -save_minimized_corpus
...
llvm-svn: 227395
2015-01-28 23:48:39 +00:00
a8fbcf0c1f
Add lit-style tests for the Fuzzer library
...
Summary: Add test targets and the lit-style runner.
Test Plan: Run the tests on bot.
Reviewers: samsonov
Reviewed By: samsonov
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D7217
llvm-svn: 227389
2015-01-28 22:49:25 +00:00
e6972a029f
[fuzzer] instructions for building/running clang-format-fuzzer
...
llvm-svn: 227357
2015-01-28 19:51:58 +00:00
bfa3f9d82f
[fuzzer] properly enable asan's coverage feedback
...
llvm-svn: 227254
2015-01-27 22:19:55 +00:00
d53b43fe11
Add a Fuzzer library
...
Summary:
A simple genetic in-process coverage-guided fuzz testing library.
I've used this fuzzer to test clang-format
(it found 12+ bugs, thanks djasper@ for the fixes!)
and it may also help us test other parts of LLVM.
So why not keep it in the LLVM repository?
I plan to add the cmake build rules later (in a separate patch, if that's ok)
and also add a clang-format-fuzzer target.
See README.txt for details.
Test Plan: Tests will follow separately.
Reviewers: djasper, chandlerc, rnk
Reviewed By: rnk
Subscribers: majnemer, ygribov, dblaikie, llvm-commits
Differential Revision: http://reviews.llvm.org/D7184
llvm-svn: 227252
2015-01-27 22:08:41 +00:00
Kostya Serebryany